Delivered-To: igsmail@igscb.jpl.nasa.gov Content-class: urn:content-classes:message Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: [IGSMAIL-4992]: Date: Mon, 9 Aug 2004 15:57:39 +0100 Message-ID: <400262841BA0864AAA844BBA06693056C0B587@largo.campus.ncl.ac.uk> Thread-Index: AcR+ITbOQYhznZnCSjaAeZWrGnA2Ig== From: "David Lavallee" To: Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 10 Aug 10:42:52 PDT 2004 Message Number 4992 ****************************************************************************** Author: David Lavellee Dear Colleagues We would like to draw your attention to the following session at the Fall AGU. "GPS time series: Signal and Noise" GPS time series are the convolution of instrumental noise and a growing number of detectable geophysical signals which operate on varying temporal and spatial scales. While one type of signal is of interest to a particular analysis group it may just be systematic error to another. Interpretation of the GPS data then depends on our ability to extract a signal of interest (usually tectonics or ground deformation associated with global change) from the total observed signal. This session will highlight two issues: 1) the difficulties associated with extracting a chosen geophysical signal from GPS time series in the presence of noise and other signals; and 2) subsequent interpretation of the chosen signal. Papers which address the characterization of noise in GPS time series e.g. hydrostatic zenith delay and its gradient, the ionosphere, multipath, antenna phase center variations, reference frame miss-modelling, etc. as well as papers focusing on the interpretation of GPS data in terms of global change (e.g. surface mass loading, post glacial rebound, tectonics, etc.) are encouraged. Additionally papers exploiting the combination of GPS with other crustal deformation techniques to extract and analyze a signal are particularly welcome. This session should be particularly relevant to members of the IGS community, and we would encourage you to submit an abstract by the 9th September deadline. Details of the AGU Fall meeting are at http://www.agu.org/meetings/fm04/ Regards David Lavallee and Tonie van Dam ----- David Lavallee School of Civil Engineering and Geosciences University of Newcastle upon Tyne NE1 7RU email; d.a.lavallee@ncl.ac.uk Tel; +44 (0) 191 222 8203 Fax; +44 (0) 191 222 6502 http://www.ceg.ncl.ac.uk